Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6719405 | Construction and Building Materials | 2016 | 7 Pages |
Abstract
The use of bio-based materials in the construction field is of great interest to society and the scientific community because of its highly sustainable character. They are formed by plant fibres and a binder, usually cement, lime or pozzolanic additives. Among the new vegetable fibres used, hemp-based biomaterials have attracted great attention in the recent years due to its excellent thermal and hygroscopic properties. However, they present a very low mechanical performance, which has intensified the search for better alternatives. In this research, the use of magnesium phosphate cement (MPC) as binder with different hemp additions (8%, 12%, 16% and 20% by weight) was evaluated. Thus, a new material made of hemp and MPC (heMPC) was developed. According to the results obtained, the heMPC could be used in floor or pre-cast structural applications since it presented enhanced mechanical (Ïmax = 0.714 ± 0.11 MPa with a 20 wt.% of hemp content) and thermal (λD = 0.103 W · mâ1 · Kâ1, density = 600 kg · mâ3) properties with respect other lime-based hemp biomaterials. Furthermore, the material exhibited good hygroscopic properties (water absorption by capillarity). Accordingly, this preliminary study allowed opening a new research line in the use of hemp bio-composites, in which other important properties are currently under investigation. The MPC used as a binder in this study was formulated with a by-product from the MgO industry, which increases the sustainability and recyclability criteria of the material developed.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
R. del Valle-Zermeño, J.E. Aubert, A. Laborel-Préneron, J. Formosa, J.M. Chimenos,